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Dai, X; Chen, B; Su, ZB; Dai X , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
Effective theory of the hole-doped spin-1 chain
Source PublicationPHYSICAL REVIEW B
KeywordOne-dimensional Antiferromagnets Haldane-gap Heisenberg-antiferromagnet Y2banio5 Dynamics Systems States Oxides Model
AbstractAn effective theory for the hole-doped spin-1 antiferromagnetic chain is proposed in this paper. The two branches of low-energy quasiparticle excitation is obtained by the diagrammatic technique. In the large t limit (in which t is the hole hopping term), the lower band is essentially the bound state of one hole and one magnon and the other band is the single-hole state. We find a critical value of t, t(c) = 0.21 Delta(H) (in which Delta(H) is the Haldane gap). For t > t(c), with the decrement of t, the mixing of these two bands become stronger and stronger, and at the same time the effective band mass becomes larger and larger. When t < t(c) the minimum of the lower band moves away from zero to the other point between zero and pi/2. The spin structure factor is also calculated in this paper, and we find that for the large t Limit the main contribution is from the interband transition, which induces a resonant peak in the Haldane gap. For the small t limit the main contribution is from the intraband transition, which only causes a diffusionlike broad bump in the Haldane gap. [S0163-1829(99)03817-5].
1999
ISSN1098-0121
Volume59Issue:18Pages:11801-11812
Subject AreaPhysics
Indexed BySCI
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/13157
Collection理论物理所科研产出_SCI论文
Corresponding AuthorDai X , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
Recommended Citation
GB/T 7714
Dai, X,Chen, B,Su, ZB,et al. Effective theory of the hole-doped spin-1 chain[J]. PHYSICAL REVIEW B,1999,59(18):11801-11812.
APA Dai, X,Chen, B,Su, ZB,&Dai X , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China..(1999).Effective theory of the hole-doped spin-1 chain.PHYSICAL REVIEW B,59(18),11801-11812.
MLA Dai, X,et al."Effective theory of the hole-doped spin-1 chain".PHYSICAL REVIEW B 59.18(1999):11801-11812.
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